* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
    font-family: "微软雅黑";
}

body {
    background: #f5f8fa;
}

.nav {
    width: 100%;
    background: #3097d1;
}

.container::after {
    content: "";
    display: table;
    clear: both;
}

.container {
    display: flex;
    width: 1200px;
    margin: auto;
    flex-wrap: wrap;
}

.container ul li {
    float: left;
}

.container ul li a {
    display: block;
    padding: 20px 0px;
    margin-right: 33px;
    color: aliceblue;
    font-size: 12px;
}

.tu-1 {
    width: 85px;
    height: 23px;
    display: block;
    float: left;
    margin-top: 17px;
    margin-right: 30px;
}

main {
    margin-top: 31px;
}

.container {
    width: 1200px;
}

.col-1 {
    flex: 1;
    flex-wrap: wrap;
    margin: 0;
}

.item-1 {
    background: #fff;
    position: relative;
    border: 1px solid #ccc;
    border-radius: 3px;
}

.tu-2 {
    height: 150px;
    width: 100%;
}

.tu-3 {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 5px solid white;
    position: absolute;
    top: 97px;
    left: 0px;
    right: 0px;
    margin: auto;
}

.item-1 h4 {
    display: block;
    margin-top: 40px;
    margin-bottom: 10px;
    text-align: center;
}

.item-1 p {
    font-size: 12px;
    text-align: center;
    padding: 0px 30px;
    padding-bottom: 30px;
}

.item-2 {
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin-top: 33px;
    padding-right: 52px;
    padding-bottom: 20px;
}

.item-2 h4 {
    display: block;
    padding: 16px 16px;
}

.item-2 p {
    display: block;
    padding: 0px 16px;
    font-size: 14px;
    line-height: 25px;
}

.item-3 {
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin-top: 33px;
    padding: 16px;
}

.item-3 h4 {
    display: block;
    margin-bottom: 10px;
}

.item-3 img {
    display: inline-block;
    width: 112px;
    height: 117px;
    margin-bottom: 10px;
}

.aa {
    margin-right: 7px;
}

.col-2 {
    flex: 2;
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin: 0px 30px;
}

.item-a-1 {
    width: 585px;
    padding: 28px 22px;
}

.item-a-1 h4 {
    display: inline-block;
    margin-bottom: 10px;
}

.item-a-1 span {
    display: inline-block;
    float: right;
    color: #999;
    font-size: 12px;
}

.item-a-1 p {
    display: block;
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 23px;
    color: #666;
}

.item-a-2 {
    width: 545px;
    display: flex;
    flex-wrap: wrap;
    padding: 28px 20px;
    margin: auto;
}

.item-a-2 img {
    display: flex;
    width: 245px;
    height: 213px;
    margin-bottom: 10px;
}

.item-a-3 p {
    font-size: 14px;
    color: #666;
    line-height: 23px;
}

.txt-1 {
    display: block;
    margin-top: 30px;
    margin-bottom: 30px;
}

.txt-2 {
    display: block;
    margin-bottom: 46px;
}

.item-a-3 {
    border-bottom: 1px solid #ccc;
    padding: 0px 26px;
}

.item-a-4 {
    border-bottom: 1px solid #ccc;
    padding: 30px 26px;
}

.item-a-4 p {
    font-size: 14px;
    color: #666;
    line-height: 23px;
}

.item-a-4 span {
    display: inline-block;
    float: right;
    color: #999;
    font-size: 12px;
}

.item-a-4 h4 {
    display: inline-block;
    margin-bottom: 10px;
}

.item-a-5 {
    border-bottom: 1px solid #ccc;
    padding: 30px 26px;
}

.item-a-5 p {
    font-size: 14px;
    color: #666;
    line-height: 23px;
}

.item-a-5 span {
    display: inline-block;
    float: right;
    color: #999;
    font-size: 12px;
}

.item-a-5 h4 {
    display: inline-block;
    margin-bottom: 10px;
}

.tu-tu {
    width: 543px;
    height: 525px;
    margin-top: 20px;
}

.tu-tu img {
    width: 100%;
    height: 100%;
}

.col-3 {
    flex: 1;
    flex-wrap: wrap;
    margin: 0;
}

.ite {
    padding: 18px;
    border: 1px solid #ccc;
    border-radius: 3px;
}

.ite img {
    display: block;
    margin: 20px 0px;
    width: 100%;
}

.ite p {
    color: #999;
}

.ite a {
    display: inline-block;
    padding: 10px;
    background: white;
    border: 1px solid #2a88bd;
    margin-top: 20px;
    border-radius: 3px;
    color: #2a88bd;
}

.ite-1 {
    padding: 18px;
    border: 1px solid #ccc;
    border-radius: 3px;
    margin-top: 33px;
}

.ite-1::after {
    content: "";
    clear: both;
    display: table;
}

.ite-1 img {
    float: left;
    width: 60px;
    height: 60px;
    border-radius: 50%;
}

.tu-a {
    float: left;
    margin-top: 10px;
    margin-right: 10px;
}

.ite-1 p {
    display: block;
    float: left;
    margin-top: 10px;
}

.tu-b {
    display: block;
    float: left;
    margin-top: 10px;
    margin-right: 10px;
}

.ite-1 a {
    display: inline-block;
    padding: 6px;
    background: white;
    border: 1px solid #2a88bd;
    margin-top: 5px;
    border-radius: 3px;
    color: #2a88bd;
}

.ite-2 {
    padding: 15px;
    border: 1px solid #ccc;
    border-top: none;
}

.ite-2 p {
    font-size: 14px;
}

footer {
    margin-top: 60px;
    border-top: 1px solid #ccc;
    padding: 60px;
}

footer .ttxt p {
    display: block;
    text-align: center;
    font-size: 14px;
    margin-bottom: 20px;
}

footer .txtt {
    text-align: center;
}

footer .txtt a {
    padding: 0px 20px;
    color: #30a3dc;
}

.tt-1::after {
    content: "";
    clear: both;
    display: table;
}

.tt-2::after {
    content: "";
    clear: both;
    display: table;
}

@media(max-width:600px) {
    .item-a-2 img {
        margin: 20px auto;
    }
    .car {
        padding: 0px 20px;
    }
    .ite-1 p {
        float: none;
    }
    nav {
        width: 100%;
    }
    .container {
        width: 100%;
    }
    .col-1 {
        width: 100%;
    }
    .col-2 {
        width: 100%;
        margin: 0px 0px;
    }
    .item-1 {
        width: 100%;
    }
    .item-3 {
        width: 100%;
    }
    .col-2 {
        width: 100%;
    }
    .item-3 img {
        display: block;
        width: 200px;
        height: 200px;
        margin: 3px;
        margin: 20px auto;
    }
    .item-a-1 {
        width: 100%;
    }
    .item-a-1 {
        width: 100%;
    }
    .item-a-2 {
        width: 100%;
    }
    .tu-tu {
        width: 100%;
        height: 100%;
        margin-top: 20px;
    }
    .col-3 {
        width: 100%;
    }
    .item-1 {
        width: 90%;
        margin: auto;
    }
    .item-2{
        width: 90%;
    margin: 20px auto;
    }
    .item-3 {
    width: 90%;
    margin: 20px auto;
}
}